A Necessary Marriage — Sylvia E. Kirk

Enid Meredith is astonished when Richard Cummings, a friend and budding author, asks her to marry him. His reasons are financial, as he must marry quickly to fulfil the strange demands of his mother's will. Richard and Enid make a pact - friendship only and a quiet divorce at some future date. But as their lives become complicated, Enid's mental and emotional resources are stretched to breaking point. Will a solution come to light and enable them to start a new life afresh?